Hess's law _____.
A.) makes it possible to calculate H for complicated chemical reactions
B.) states that when you reverse a chemical equation, the sign of H does not change
C.) determines the way a calorimeter works
D.) describes the vaporization of solids
Please help - I think it is A
A
A
B
J IS RIGHT.
I don't like any of the choices; however, B, C, and D are cockeyed answers so I would pick A. The reason I don't like A is because it also makes it possible for simple reactions.
It is A
You are correct, the answer is A) makes it possible to calculate H for complicated chemical reactions.
Hess's law is a fundamental principle in chemistry that allows us to calculate the enthalpy change (ΔH) for a chemical reaction by considering the enthalpy changes of related reactions. It states that the total enthalpy change for a reaction is independent of the pathway taken, as long as the initial and final conditions are the same.
To get this answer, you can recall the definition and purpose of Hess's law. By understanding that Hess's law enables the determination of enthalpy change for complicated chemical reactions by summing up the enthalpies of simpler reactions, you can conclude that option A is the correct choice.